Multi-Link Backoff Synchronization for Collision-Safe WLAN Access
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Solution Overview
Problem
Existing wireless LAN technologies face challenges in efficiently supporting multi-link transmission with synchronized frame start times, leading to potential collisions and inefficiencies in channel access.
Innovation Solution
A method and apparatus for multi-link synchronized transmission involving backoff operations on multiple links, ensuring synchronized frame start times and channel access parameters, with mechanisms to handle channel state changes and prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link transmission is supported to increase throughput, then communication efficiency is improved, but channel access collisions occur and transmission reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by performing backoff operations on each link before multi-link synchronized transmission. Each station device independently performs backoff counting on the first link and second link, and only proceeds to transmission when both backoff operations are complete, thereby preventing collisions in advance while enabling efficient multi-link transmission
Solution Approach 2:
The patent segments the channel access process into independent backoff operations for each link. The first backoff operation and second backoff operation are executed separately on the first link and second link respectively, allowing each link to be managed independently while achieving synchronization at the transmission stage
2Reliability
If backoff operations are performed independently on each link, then channel access control is improved, but transmission synchronization becomes difficult to maintain
Solution Approach 1:
The patent merges the independently executed backoff operations with a common synchronization mechanism. After performing independent backoff operations on both links, the station device waits for a synchronization signal and only transmits when both links are ready, combining independent control with synchronized execution to maintain transmission timing consistency
Data Source
AI summary
A method and a device for medium access in multi-link synchronization transmission are disclosed. This method of a STA MLD comprises the steps of performing a first backoff operation in a first link; maintaining, as 0, a backoff counter value for the first backoff operation for multi-link synchronization transmission in the first link and a second link if the first backoff operation is completed; performing a second backoff operation in the second link; and performing the multi-link synchronization transmission in the first link and the second link if the second backoff operation is completed.